Date: Mon, 11 Nov 1996 17:31:00 GMT
Server: NCSA/1.5
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Last-modified: Mon, 23 Oct 1995 20:31:24 GMT
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<title>Comparison of Skeletonization Methods</title>
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<body>
<h1>Comparison of Skeletonization Methods</h1>
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<TABLE BORDER=0>

<TR ALIGN=CENTER VALIGN=TOP>
<TD>
<IMG WIDTH=323 HEIGHT=243 HSPACE=3 VSPACE=2 SRC="hw1-result/thin/hand.gif"> <BR>
<H3>Thinning</H3>
</TD>
<TD>
<IMG WIDTH=361 HEIGHT=243 HSPACE=3 VSPACE=2 SRC="hw1-result/thin/hand22.gif"> <BR>
<H3>Thinning 22.5</H3>
</TD>
</TD>
</TR>

<TR ALIGN=CENTER VALIGN=TOP>
<TD>
<IMG WIDTH=323 HEIGHT=243 HSPACE=3 VSPACE=2 SRC="hw1-result/medial-cityblock/hand.gif"> <BR>
<H3>MAT (City-block)</H3>
</TD>
<TD>
<IMG WIDTH=363 HEIGHT=242 HSPACE=3 VSPACE=2 SRC="hw1-result/medial-cityblock/hand22.gif"> <BR>
<H3>MAT (City-block) 22.5</H3>
</TD>
</TD>
</TR>

<TR ALIGN=CENTER VALIGN=TOP>
<TD>
<IMG WIDTH=323 HEIGHT=243 HSPACE=3 VSPACE=2 SRC="hw1-result/medial-chessboard/hand.gif"> <BR>
<H3>MAT (Chessboard)</H3>
</TD>
<TD>
<IMG WIDTH=359 HEIGHT=242 HSPACE=3 VSPACE=2 SRC="hw1-result/medial-chessboard/hand22.gif"> <BR>
<H3>MAT (Chessboard) 22.5</H3>
</TD>
</TD>
</TR>

<TR ALIGN=CENTER VALIGN=TOP>
<TD>
<IMG WIDTH=323 HEIGHT=243 HSPACE=3 VSPACE=2 SRC="hw1-result/medial-euclid/hand.gif"> <BR>
<H3>MAT (Approx. Euclidean)</H3>
</TD>
<TD>
<IMG WIDTH=361 HEIGHT=240 HSPACE=3 VSPACE=2 SRC="hw1-result/medial-euclid/hand22.gif"> <BR>
<H3>MAT (Approx. Euclidean) 22.5</H3>
</TD>
</TD>
</TR>


</TABLE>

<BR>
<HR SIZE=3>
<br>
<H3>Some Observations on the Results</H3><P>
Notice that the thinning method produces connected skeletons while
the Medial Axis Transform (MAT) methods do not, even for the approximate
Euclidean case.  On the other hand, notice that the MAT is relatively
invariant to orientation of the object, while the thinning method varies
significantly with orientation.  

<A href="hw1-result/hw1-comments.txt">
<H3>Bryan's comments on the grading of the assignment</H3>
</A>
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